My small intestine epithelium cells are replaced thousands times more than my prostate. Yet I'm much more likely of getting a prostate cancer than cancer on my intestine epithelium. Is there a known ...

So some years ago, I remember watching a survival show in which the host said that human males produce a type of chemical in the urine that animals such as wolves can acknowledge as a territory marker....

Post puberty humans begin to secrete a substance called Sebum which changes the neutral PH of our skin from ~7 to 4.5-5.5. This has that advantage of serving as a protective line against pathogens and ...

I am a writer with a question for a story I'm working on. In it, the character suffers from muscle atrophy due to spinal damage. So that I can portray this accurately, what would cause this type of ...

What percentage of the human genome hasn't been sequenced yet? I have read different estimates, e.g.:
https://www.genome.gov/human-genome-project/Completion-FAQ (mirror): "In the April 2003 version, ...

I want to know what phosphorylates tau protein and its 6 isoforms.
I know kinases cause phosphorylation events, and in tau it can be phosphorylated in a healthy neuron in the trans conformation, but ...

I'm trying to think in terms of "how fast" someone can do something, like swing a bat or push a crate. Someone might have a lot of muscle mass, but that also increases how much mass an arm has to move ...

In an article about the latest earthquake to strike Mexico, I read that a rescuer said to someone in a gurney, "Fight for your life, please!"
I've seen similar things in TV shows and movies where a ...

Don't coma individuals feel hungry? If so, how does the brain senses this condition (as coma is caused by neural death or damage) and switches off gene expression of ghrelin and leptin.
Is there any ...

I know that conception is a multi-step process. A sperm fuses with an egg. Its contents diffuse into the cytoplasm.
Dad's DNA is transported to the nucleus. Proteins are gradually made from Dad's DNA....

I recently heard a claim that Asians in general have more difficult births than Europeans. Is this true?
I have found a few studies(1,2) on the effect of ethnicity on birth outcomes but they seem to ...

Does anyone know where I can find a reliable list of virucides (not anti-virus) that can be used by humans? This virucide must be able to affect viruses that are already inside the cells. St John's ...

According to the article Bad molars? The origins of wisdom teeth, in our evolutionary history, people were eating harder food like nuts and had unimpacted wisdom teeth. Later, that article appears to ...

Onions are one of the many foods we shouldn't feed our pets. Looking it up, I learned that onions cause hemolytic anemia in MANY species: cattle, sheep, horses, dogs, cats, and even some primates. If ...

Dry water consists of water droplets that have been coated with silica nanoparticles, which prevents the droplets from forming a liquid.
If a human swallows dry water, does it have the same effect as ...

Aren't those 2 statements contradicting each other?
See https://en.wikipedia.org/wiki/Hayflick_limit and e.g. http://book.bionumbers.org/how-quickly-do-different-cells-in-the-body-replace-themselves/....

I have read that skeletal muscle cells cannot multiply and are generally not created after early development. However, I have also read that they have a "lifespan" of 10-15 years. Could this lifespan ...

Whenever we have "goosebumps", there is a momentary piloerection, due to which hair on our elbows and legs get "erected" and "stand" almost perpendicular to the surface of our skin. But why do our "...

Suppose a naive T cell comes in contact with an APC. How much time does it take for the T Cell to get activated and within how much time does the T cell move away from the APC due to incompatibility ...

Human babies are clearly not born knowing whether/how to hold in urine and feces, and teaching them to do so requires a nontrivial (really nontrivial...) amount of work on the parents' part. But once ...

The difference between diarrhoea and dysentery is quite clear; but the appearance of blood in stool or bloody diarrhoea is a very confusing term when compared with dysentery. Are they different in the ...